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US Patent 11855595 Composite cascode power amplifiers for envelope tracking applications

Patent 11855595 was granted and assigned to Skyworks Solutions on December, 2023 by the United States Patent and Trademark Office.

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Patent abstract

Composite cascode power amplifiers for envelope tracking applications are provided herein. In certain embodiments, an envelope tracking system includes a composite cascode power amplifier that amplifies a radio frequency (RF) signal and that receives power from a power amplifier supply voltage, and an envelope tracker that generates the power amplifier supply voltage based on an envelope of the RF signal. The composite cascode power amplifier includes an enhancement mode (E-MODE) field-effect transistor (FET) for amplifying the RF signal and a depletion mode (D-MODE) FET in cascode with the E-MODE FET.

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